--- a/src/newgrf_sound.h	Tue Mar 20 20:11:17 2007 +0000
+++ b/src/newgrf_sound.h	Wed Mar 21 03:06:21 2007 +0000
@@ -1,5 +1,7 @@
 /* $Id$ */
 
+/** @file newgrf_sound.h */
+
 #ifndef NEWGRF_SOUND_H
 #define NEWGRF_SOUND_H